I am a volunteer firefighter here in southern Indiana. I also have a Dodge Ram, but I don't have wig-wags on my truck, as I live about a block from the fire station, and don't get to run my blue lights very often. If you go to www.galls.com, they have a self-contained wig-wag set up for 19.99. We have one of these installed on our '99 Ford F350 first out truck, and it was pretty simple to do, and works fine. They also have strobe kits, or pieces to build your own set up. Hope this helps!